2006-2012 Honda TRX90 TRX90EX/X Service Manual, Page 65Get this manual
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5FUEL SYSTEM
CARBURETOR ASSEMBLY5-11 CARBURETOR INSTALLATION 5-14 AIR SCREW ADJUSTMENT 5-16 HIGH ALTITUDE ADJUSTMENT 5-17 SECONDARY AIR SUPPLY SYSTEM (U.S.Atype only) 5-19